How do I programmatically set the background color gradient on a Custom Title Bar?

To do this in code, you create a GradientDrawable.
The only chance to set the angle and color is in the constructor.If you want to change the color or angle, just create a new GradientDrawable and set it as the background

    View layout = findViewById(R.id.mainlayout);    GradientDrawable gd = new GradientDrawable(            GradientDrawable.Orientation.TOP_BOTTOM,            new int[] {0xFF616261,0xFF131313});    gd.setCornerRadius(0f);    layout.setBackgroundDrawable(gd);

For this to work, I added an id to your main LinearLayout as follows

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/mainlayout"    android:orientation="horizontal"    android:layout_width="fill_parent"    android:layout_height="fill_parent"><ImageView                 android:layout_width="fill_parent"              android:layout_height="wrap_content"              android:src="@drawable/title_bar_logo"              android:gravity="center_horizontal"              android:paddingTop="0dip"/></LinearLayout>

And to use this as for a custom title bar

    getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.custom_title_bar);    View title = getWindow().findViewById(R.id.mainlayout);    title.setBackgroundDrawable(gd);

If accepted answer is not working, you can try to set foreground.

color.setForeground(gradient);